This neatly states the dilemma we face if we choose to deal with Republican lack of backbone by sitting on our hands in the next election. The problem is how to instill some spine in our representatives without simultaneously getting something far worse. We don't want to bite our noses to spite our faces. The only effective answer I've come up with is a contribution strike against the RNC, the Republican Congressional Committee, and the Republican Senatorial Committee. As Lyndon Johnson said, "Money is the mother's milk of politics." If we cut them off NOW AND DECISIVELY, tell them exactly why we're doing it, and what they can do to get us to turn the money flow back on, then we have a good chance of defeating this immigration monstrosity and doing something about other things. The beauty of this approach is it causes immense initial pain that's likely to get attention and compliance, while avoiding permanent injury. Nothing else shows any genuine hope of being really effective.
Oh, I agree with you about the money thing. My checkbook is closed. But beyond the money thing, we still have to do something on election day. Staying home will evaporate our clout, not enhance it. And there will be 8 years of Hillary. G-d only knows what will follow next ...